What shadow color is very easy to solve, just check that the data cable (which indicates the yellow or Yellow) ranging from pop unit (is the prism having 3 mini LCD through which pass the 3 primary colors ) to the logic card is properly connected (sometimes we do not get either cable or left side), I recommend very carefully, with the projector on and disarmed (careful not to burn or electrocute) you try to accommodate the cable data refer you until you no longer see the yellow ghost, which by the way if the red data cable that was improperly connected, ghosts red and blue with blue would.